PyQt 4 - save all data in window to file on app close [duplicate]

This question already has answers here: 开发者_开发知识库 How to remember last geometry of PyQt application? (4 answers) Closed 4 years ago.

Is there a fast python way to save all data in all widgets to file before app is close? And of course read it and restore after app is re-run?

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QWidget.saveGeometry saves the geometry of an widget.
QMainWindow.saveState saves the window's toolbars and dockwidgets.
To save other things you can use pickle.

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Based on the question How to remember last geometry of PyQt application? and completing @Artur Gaspar answer, this is a full working example:

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QMainWindow
from PyQt5.QtCore import QSettings, QPoint, QSize

class myApp(QMainWindow):

    def __init__(self):
        super( myApp, self ).__init__()
        self.settings = QSettings( 'My company', 'myApp' )

        # Initial window size/pos last saved. Use default values for first time
        windowScreenGeometry = self.settings.value( "windowScreenGeometry" )
        windowScreenState = self.settings.value( "windowScreenState" )

        if windowScreenGeometry:
            self.restoreGeometry( windowScreenGeometry )

        else:
            self.resize( 600, 400 )

        if windowScreenState:
            self.restoreState( windowScreenState )

    def closeEvent(self, e):
        # Write window size and position to config file
        self.settings.setValue( "windowScreenGeometry", self.saveGeometry() )
        self.settings.setValue( "windowScreenState", self.saveState() )
        e.accept()

if __name__ == '__main__':
    app = QApplication( sys.argv )
    frame = myApp()
    frame.show()
    app.exec_()